Research on English as the medium of instruction has proliferated in the past decades. To date, few studies have investigated the influence of pedagogical tools used by teachers to foster the learning of college students in EMI contexts. This paper reports preliminary findings from classroom research investigating 26 college students’ perceptions of reflective writing in a general education course taught in English. The participants were enrolled in a reading course at a private university in northern Taiwan. They were of varying English proficiency levels and majoring in different fields. Analyses on their responses to eleven Likert-scale questions and three open-ended questions were conducted. The findings benefit not only students taking EMI courses but also instructors who are teaching a large size class in English and teachers whose classes have students of diverse professions and varying English proficiency levels.